This is the Propeller Lock Nut Set for the OS Max 1.60FX and 108 FSR Engines.

FEATURES: Prevents the propeller from flying off even if the propeller
            should slip or loosen
          Durable steel construction.

INCLUDES: One metal propeller washer (13.9mm I.D, 34.7mm O.D, 5.7mm thick)
          One metal hex lock nut (sandwiched between prop washer and
            expansion bolt)
          One metal hex expansion bolt(installed last inside the lock nut)

REQUIRES: A 1.60FX or 108 FSR engine, or an engine that accepts 3/8-24 threads.

SPECS:    Thread size: 3/8-24
                                                                    sml10/26/00
                                                                          ir/jl
                                                                upd NNA 2/13/02